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An aftertreatment system for the passenger vehicles with a gasoline engine
Hána, Michal ; Fridrichová, Kateřina (referee) ; Böhm, Michael (advisor)
This thesis concentrates on the issue of reducing emissions from passenger vehicles with a gasoline engine. The introduction describes the individual emission components, their origin and impact on the environment and human organism. The main part of the thesis concentrates on possibilities of reducing emissions. The function and design solution for each component of the emission system is described. Furthermore, the specific solutions for several selected representatives from diverse vehicles categories are stated. These solutions are evaluated and custom configuration is designed given the selected parameters. In the conclusion are summarised the results of the thesis.
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Turbocharger
Růsek, Lukáš ; Novotný, Zdeněk (referee) ; Fiedler, Jan (advisor)
A masters thesis deals with the question of deisel engine boosting by rotary turbochargers. The objective of the thesis is to propose suitable turbocharger´s concept for defined diesel combustion engine with power of 430 [kW]. The air boosting pressure is controlled by exhaust gas flow through the turbine and different EGR regimes, which are considered in the basic and corrected calculations. The final turbocharger´s concept is proposed to satisfy the defined technical requirements. Next technical recommendations are briefly summarized in the thesis conclusion for following turbocharger´s concept application.
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Proposal of Engine Intake System with Exhaust Gases Recirculation
Vojkůvka, František ; Štěpánek, Karel (referee) ; Dundálek, Radim (advisor)
The object of the diploma thesis is to optimize vacuum function of the ejector using computional fluid dynamics, or CFD. The ejector is inserted to the intake system of the six - cylinder diesel engine to increase the pressure gradient of the exhaust gas recirculation system. The analysis of the current design solution is performed and then the ejector with the new shape affording higher vacuum effect is proposed. The introductory part is devoted to the questions of diesel engines emissions and technology to reduce emissions in the exhaust system focused on the EGR.
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Tractors` Injection Systems Overwiev
Poláček, Milan ; Svída, David (referee) ; Dundálek, Radim (advisor)
The object of the bachelor’s thesis is to create an overview of injection systems at currently produced tractors. The first part of the overview is concerned with conceptions of diesel injection by tractors’ engines and with a description of its parts. There are also referred related technologies for power boosting. The second part is devoted to particular marks of tractors and used injection systems.
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Exhaust Gas Recirculation of a Spark-ignition Engine
Dohnal, Martin ; Lempera, Aleš (referee) ; Drápal, Lubomír (advisor)
This master‘s thesis deals with design adjustment of spark ignition combustion engine, which might offer larger share of recirculated exhaust gases in cylinder for reaching a large number of benefits that exhaust gas recirculation can offer. The introductory theoretical part describes exhaust gas recirculation and its influence on spark ignition combustion engine. In the following part the methods of mixture layering and types of intake ports are described. Further design of spiral intake port is made based on calculations. Capability of mixture layering is valuated by numerical simulation. Flow properties of intake ports are compared to production version by an experiment on flow station.
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